PLATE XXXIII. LARGE-TOOTHED ASPEN. 



1. A staminate flowering branch, x i. 



2. A staminate flower, enlarged. 



3. A pistillate flowering branch, x J. 



4. A pistillate flower, enlarged. 



5. A fruiting catkin with capsules, x J. 



6. A seed with hairs, enlarged. 



7. A branch with mature foliage, x J. 



8. A winter twig, x J. 



9. Section of a winter twig, enlarged. 



